I have been having problem setting alarms for Reminders in iCal. If I set an alert ("Message with sound") for the same day as it is due, it sets the time at 7:00AM and I cannot change it. If I set the alert for the day before (or any number of days before), I can edit the time without issue. I am running 10.7.1 on a MacBook Pro, but I was having the same problem before I upgraded to Lion.

Any help would be greatly appreciated.